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Comparison of Several CU(I) and CU(II) Precursors for the Sol-Gel Preparation of High TC Superconducting Metal Oxides

  • Mariquita A. Accibal (a1), Jonathan W. Draxton (a1), Allen H. Gabor (a2), Wayne L. Gladfelter (a1), Beth Anne Hassler (a2) and Martha L. Mecartney (a2)...

Abstract

A comparison of the use of three different coordination compounds of copper as precursors for the sol-gel synthesis of YBa2Cu3O7-δ has been made. For yttrium, the tris(isopropoxide) was used exclusively, while the use of both Ba(O-i-Pr)2 and Ba(OCH2CH2OEt)2 (prepared in situ from Ba metal) as sources for Ba were studied. After dissolving Y(O-i-pr)3, a Ba source, and the copper(I) alkoxide, [Cu(O-i-Bu)]4, hydrolysis led immediately to an orange gelatinous solid which yielded YBa2Cu3O7-δ upon firing in oxygen. Copper(II) acetate was found to give heterogeneous mixtures under our conditions and was not further studied. Copper(II) acac (acac = acetylacetonate) yielded the best results. Partially hydrolyzed solutions of Cu(acac)2, Ba(OCH2CH2OEt)2, and Y(O-i-pr)3 were spin coated on SrTi03 (100) and fired under oxygen to give oriented (b axis normal to the surface) thin films of YBa2Cu3O7-δ. The onset of superconductivity for the films was 92 K, but they did not reach zero resistance until much lower temperatures.

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1. Tsuda, T., Hashimoto, T., and Saegusa, T., J. Am. Chem. Soc. 24, 658 (1972).
2. Geerts, R. L., Huffman, J. C., Folting, K., Lemmen, T. H., and Caulton, K. G., J. Am. Chem. Soc. 105, 3503 (1983).
3. Livage, J. in Better Ceramics Through Chemistry II, edited by Brinker, C. J., Clark, D. E., and Ulrich, D. R. (Mater. Res. Soc. Proc. 73, Palo Alto, CA 1986) pp. 717 -724.
4. Hirano, S., Baney, R. H., Hayashi, T., and Takahashi, S., Amer. Cer. Soc, Electronics Div. Mtg., October 19, 1987.
5. Kramer, S., Wu, K., and Kordas, G., Amer. Cer. Soc, Electronics Div. Mtg., October 19, 1987.
6. Cava, R. J., Batlogg, B., van Dover, R. B., Murphy, D. W., Sunshine, S., Siegrist, T., Remeika, J. P., Rietman, E. A., Zahurak, S., and Espinosa, G. P., Phys. Rev. Lett. 58, 1676 (1987).
7. Frase, K. G., Adv. Ceram. Mater. 2, 295 (1987).
8. Gross, M. E., Hong, M., Liou, S. H., Gallagher, P. K., and Kwo, J., Appl. Phys. Lett. 51, 160 (1988).
9. Chiang, Y.-M., Furcone, S. L., Ikeda, J. S., and Rudman, D. A., Mater. Res. Soc. Proc., in press, Boston, MA, 1987.

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